Ultrasonic Bat Detector Recorder
A heterodyne bat detector that converts ultrasonic calls to audible sound. The 150x80x40mm device detects 20-120kHz and shifts down to human hearing range. Records to SD card. LED spectrogram display. Headphone output. Essential for bat surveys and nocturnal wildlife observation. This bat detector project is perfect for makers, DIY enthusiasts, and electronics hobbyists. Search volume: 1600/month.
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AI-generated from prompt:"A heterodyne bat detector that converts ultrasonic calls to audible sound. The 150x80x40mm device detects 20-120kHz and shifts down to human hearing range. Records to SD card. LED spectrogram display. Headphone output. Essential for bat surveys and nocturnal wildlife observation."
All parts, CAD, wiring, and firmware generated by Modo AI Hardware Builder with human direction.
—Validated fit
—Electrical OK
—Assembly ready
Parts
| Part | Why | MPN | Qty |
|---|---|---|---|
| ESP32-S3 Main Controller Espressif Systems Main MCU for bat detector processing - provides ADC for ultrasonic input, DAC for audio output, dual cores for real-time heterodyne conversion, and I2S for digital audio |
ESP32-S3 |
1 | |
| Ultrasonic Microphone TDK InvenSense High-frequency MEMS microphone for capturing ultrasonic bat calls (20-120kHz range) - has wide frequency response needed for bat detection |
ICS-43434 |
1 | |
| OLED Display Newhaven Display Intl LED spectrogram display for visual frequency analysis as specified in requirements |
NHD-0216K3Z-NSW-BBW-V3 |
1 | |
| microSD Card Socket Cinch Connectivity Solutions Johnson SD card recording capability as required in features list |
105-0851-001 |
1 | |
| 3.5mm Headphone Jack Cinch Connectivity Solutions Johnson Headphone output for listening to frequency-shifted bat calls as specified in requirements |
105-0853-001 |
1 | |
| 18650 Battery Holder MPD (Memory Protection Devices) Battery power for handheld design constraint - provides portable operation |
BK-18650-PC4 |
1 | |
| 3.3V LDO Regulator Texas Instruments Converts 4.2V battery voltage to stable 3.3V for all electronics |
LM1117MPX-3.3/NOPB |
1 | |
| Power Switch C&K On/off control for handheld device as needed for battery operation |
OS102011MS2QN1 |
1 | |
| Frequency Control Button E-Switch User controls for adjusting heterodyne frequency mixing and device operation |
TL2285OA |
2 | |
| Bypass Capacitors 100nF Keystone Electronics Decoupling capacitors for stable power supply to all active components |
1042P |
10 |
10 unique parts, 20 total components